Why was there more matter than antimatter in the Universe?
13.8 billion years ago, shortly after the Big Bang, the universe expanded rapidly and a large amount of energy was converted into matter.
Physicists speculate that this process initially produced equal amounts of matter and antimatter, which would be annihilated once they contacted.
But then an unknown event was sent, making matter more than antimatter, and then forming all the things we can see and touch.
Studies have shown that the clues of the event may be hidden in tiny ripples in time and space.
But in fact, the universe has evolved for tens of billions of years and continues to exist today. Obviously, not all matter was annihilated at the beginning.
The answer to this question may also involve a very strange elementary particle-neutrinos.
The neutrino is not charged, and its antiparticle may be itself.
One view is that about 1 million years after the Big Bang, the universe underwent a phase change as it cooled.
Droll said: "This disguise may cause neutrinos to produce slightly more matter than antimatter when decayed. But there is no easy way to verify whether this event has actually happened in the universe.
But the Droll team found a way through modeling and calculations that might be able to show us this disguised process.
They proposed that the phase transition may produce an extremely slender energy line, which is still permeating the universe to this day.
These cosmic rays are very likely to cause tiny ripples in space and time, that is, gravitational waves.
As long as the corresponding gravitational waves are detected, the correctness of this theory can be verified.